1. Introduction
The PRUNUS J-110 is a versatile portable retro radio designed to provide a nostalgic listening experience with modern connectivity. It features FM, AM, and SW radio reception, along with Bluetooth, TF card, USB, and AUX input for diverse audio playback options. This manual provides detailed instructions for the safe and effective use of your PRUNUS J-110 radio.
2. Important Safety Information
- Read all instructions carefully before using the device.
- Keep the device away from water, moisture, and direct sunlight.
- Do not disassemble or attempt to repair the unit yourself. Refer all servicing to qualified personnel.
- Ensure proper ventilation around the unit to prevent overheating.
- Use only specified power sources and accessories.
- Remove D-cell batteries when using AC power or the built-in rechargeable battery to prevent damage.
3. Package Contents
Please check the package for the following items:
- PRUNUS J-110 Portable Retro Radio Unit
- AC Power Cable
- USB Charging Cable
- AUX Audio Cable
- User Manual (this document)
4. Product Overview
Familiarize yourself with the controls and ports of your PRUNUS J-110 radio.
Figure 4.1: Front View of the PRUNUS J-110 Radio
Figure 4.2: Detailed View of Controls and Indicators
Front Panel Controls:
- Volume Knob: Turns the radio ON/OFF and adjusts the volume level.
- Band Switch: Selects between MP3, FM, AM, and SW radio bands.
- Tuning Knob: Fine-tunes radio frequencies.
- Band Magnifier: Magnifies the frequency display for easier tuning.
- Luminous Mirror: Backlit display for visibility in low light.
Top Panel Controls & Ports:
- DC 5V Port: For USB charging.
- AUX Input: 3.5mm jack for connecting external audio devices.
- TF Card Slot: For playing MP3 files from a TF (Micro SD) card.
- USB Slot: For playing MP3 files from a USB flash drive.
- Playback Buttons: Play/Pause, Previous Track, Next Track.
- Mode Button: Switches between different playback modes (Bluetooth, TF, USB, AUX).
- Charging Indicator: Light indicating charging status.
Rear Panel:
Figure 4.3: Rear View with Power Options
- AC IN Port: For connecting to AC power using the provided cable.
- D Battery Compartment: Holds D-cell batteries for portable power (batteries not included).
- Retractable Antenna: Extends for improved radio reception.
5. Setup
5.1 Powering the Radio
The PRUNUS J-110 offers three power options:
- AC Power: Connect the supplied AC power cable to the AC IN port on the rear of the radio and plug it into a wall outlet.
- Built-in Rechargeable Battery: The radio has a built-in 1200mAh rechargeable battery. To charge, connect the USB charging cable to the DC 5V port and a USB power source (e.g., computer, USB wall adapter). The charging indicator will illuminate.
- D-Cell Batteries: For extended portable use, open the battery compartment on the rear and insert D-cell batteries (not included). Ensure correct polarity.
Important: To prevent damage, always remove D-cell batteries when operating the radio via AC power or charging the built-in rechargeable battery.
5.2 Antenna Setup
For optimal radio reception, extend the retractable antenna fully when listening to FM or SW bands.
6. Operating Instructions
6.1 Power On/Off and Volume Control
Turn the Volume knob clockwise to power on the radio. Continue turning to increase the volume. Turn counter-clockwise to decrease volume and power off the radio.
6.2 Radio Mode (FM/AM/SW)
- Switch the Band Switch to your desired band (FM, AM, or SW).
- Extend the retractable antenna for better reception, especially for FM and SW.
- Slowly rotate the Tuning Knob to scan for stations. The frequency will be displayed on the luminous mirror with the band magnifier.
- Adjust the antenna position and radio orientation for the best signal.
Figure 6.1: Enhanced Reception with DSP Chip and Copper Antenna
6.3 Bluetooth Mode
- Switch the Band Switch to MP3 mode.
- Press the Mode Button repeatedly until you hear an audible prompt indicating Bluetooth mode. The radio will enter pairing mode.
- On your mobile device, enable Bluetooth and search for available devices. Select "PRUNUS J-110" to pair.
- Once paired, you can play audio from your device through the radio.
6.4 TF Card / USB Playback Mode
- Insert a TF (Micro SD) card or USB flash drive containing MP3 audio files into the respective slot on the top panel.
- Switch the Band Switch to MP3 mode.
- The radio should automatically detect and begin playing the MP3 files. If not, press the Mode Button to cycle through modes until MP3 playback starts.
- Use the Play/Pause, Previous Track, and Next Track buttons to control playback.
6.5 AUX Input Mode
- Connect one end of the supplied AUX audio cable to the AUX input port on the top panel of the radio.
- Connect the other end of the AUX cable to the headphone jack or audio output of your external audio device (e.g., smartphone, MP3 player).
- Switch the Band Switch to MP3 mode.
- Press the Mode Button repeatedly until you hear an audible prompt indicating AUX mode.
- Play audio from your external device, and the sound will be output through the radio's speaker.
Figure 6.2: Universal Compatibility Options
Video 6.1: PRUNUS J-110 Product Showcase and Features
7. Maintenance
7.1 Cleaning
Wipe the radio with a soft, dry cloth. Do not use abrasive cleaners, waxes, or solvents as they may damage the finish.
7.2 Storage
When not in use for extended periods, store the radio in a cool, dry place. If using D-cell batteries, remove them to prevent leakage and damage to the unit.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Radio does not power on. | No power source, dead batteries. | Ensure AC cable is properly connected, or check/replace D-cell batteries. Charge the built-in battery. |
| Poor radio reception. | Antenna not extended, weak signal. | Extend the retractable antenna fully. Reposition the radio for better signal reception. |
| Bluetooth not connecting. | Not in pairing mode, device too far. | Ensure the radio is in Bluetooth mode and discoverable. Keep your device within range (approx. 10 meters). |
| No sound from TF card/USB. | Incorrect mode, unsupported file format, card/drive not inserted correctly. | Ensure the radio is in MP3 mode. Check that the TF card/USB drive is inserted correctly. Ensure files are in MP3 format. |
| No sound from AUX input. | Incorrect mode, cable not connected, external device volume low. | Ensure the radio is in AUX mode. Check AUX cable connections. Increase volume on both the radio and the external device. |
9. Specifications
| Feature | Detail |
|---|---|
| Model Number | J-110 |
| Brand Name | PRUNUS |
| Dimensions (WxHxD) | 24.50 x 13.10 x 18.10 cm (approx. 9.1 x 3.9 x 5.9 inches) |
| Weight | Approx. 1230g (2.71 lbs) |
| Body Material | Plastic |
| Power Supply | Rechargeable Battery Pack (1200mAh), AC Power, D Batteries (not included) |
| Radio Type | AM / FM, SW |
| Antenna | Retractable, approx. 50cm |
| Speaker | Built-in 3W high-quality speaker |
| Functions | Built-In Speaker, Built-in Amplifier, Bluetooth, TF Card Playback, USB Playback, AUX Input |
| Bluetooth Version | 4.0 |
| WIFI | No |
| Screen | No (Analog dial with luminous mirror) |
| Certification | CE |
Figure 9.1: PRUNUS J-110 Dimensions
10. User Tips
- Battery Safety: Always remove D-cell batteries when using AC power or charging the built-in rechargeable battery to prevent potential damage or overheating.
- Sound Quality: The radio features a powerful 3W speaker and DSP chip, providing rich and well-balanced sound suitable for various music genres like classical, country, and rock.
- No Earphone Jack: Please note that this model does not include an earphone jack. Audio output is solely through the built-in speaker.
- Easy Operation: The large analog dial and simple knob layout make the radio straightforward to operate, appealing to users who prefer a traditional interface over complex digital controls.
11. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the warranty card included with your product or contact the PRUNUS Official Store directly. Keep your purchase receipt as proof of purchase.